Punch-transfer slide for multiple-stroke headers



May 6, 1930. A. H. GAESS PUNCH TRANSFER SLIDE FOR MULTIPLE STROKE HEADERS 2 Sheets-Sheet l Filed Sap; 27, 1927 W .I. \v

y 6, 1930. A. H. GAESS 1,757,303

PUNCH TRANSFER SLIDE FOR MULTIPLE STROKE HEADERS Filed Sept. 27, 1927 2 Sheets-Sheet 2 Patented May 6, 1930 UNITED STATES PATENT FFICE ALBERT H. G-AESS, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE E. J. MANVILLE MACHINE COMPANY, OF WATERBURY, CONNECTICUT, A CORPORATION OF CON- NECTICUT PUNCH-TRANSFER SLIDE FOR MULTIPLE-STROKE HEADERS Application filed September 27, 1927. Serial No. 222,283.

In a multiple stroke cold heading machine of the type illustrated in patent to Campbell No. 926,170, June 29, 1909, two or more punches are attached to a slide mounted on a gate that is reciprocated to carry the punches toward and from the work, and the position of this slide is changed vertlcally to bring first one, then another punch into line with the work, by mechanism such, for example, as illustrated in patent to Gaess, No. 1,372,132, March 22, 1921.

This invention relates to the construction of such a punch transfer slide and the means whereby its vertical movements are accurately controlled so that the punches will align with the work.

In the prior machines the transfer slide was Z-shape and there were two stops, one on each side of the center line of the slide for determining its up and down positions. There are objections to this construction, one being the cost of forging and machining the slide owing to its shape, another being the fact that when the slide was stopped in either the up or down positions the reactions produced tended to wear the slide and its way sidewise, due to the fact that the stops were located at each side of the center and produced side thrusts. Furthermore, the old slide was relatively heavy and to an extint that tended to limit the speed of the ma 0 me.

The object of this invention is to eliminate the objectional features of the old slide and provide a slide which is considerably cheaper to manufacture and is lighter in weight and therefore lends itself to higher speeds of the machine, also to provide simple, compact and easily adjustable stopping means for determining the limits of the up and down movements of the slide, which means are located on the center line of the slide, and therefore all side thrusts on the slide as the stops act are eliminated, reducing the wear of both the slide and its way.

In the accompanying drawings Fig. 1 shows a longitudinal section of so much of a double blow cold heading machine provided with the improved slide and stopping means as is necessary to an understanding of this invention. Fig. 2 shows a top view of the forward end of the gate and the transfer slide.

Fig. 3 on larger scale shows a front elevation of the transfer slide with the punches and the improved stopping means. Fig. 4 is a vertical section showing the forward end of the gate, the improved slide with the punches, and the stopping means.

The gate 1 of the machine illustrated is re ciprocated by the link 2 from the crank 3. The transfer slide 4: which is fitted to have vertical movement in the front end of the gate comprises an upright section 5 of dovetail cross section, and a horizontal section 6 extending forwardly at the bottom. Fastened to the outer face of the transfer slide is a hard backing plate 7 and in front of this is fastened a punch block 8 which holds the punches 9 and 10 that are rcciprocated toward and from and alternately raised and lowered into line with the die 11. The lower endof the transfer slide is fastened to a plate 12 by screws 13, which plate is free to move horizontally in, but is raised and lowered by the cradle 14: that is carried by the crank 15 which is oscillated by well known mechanism, for instance, such as is illustrated in the Gaess patent above referred to.

In carrying out this invention a stud 16 is screwed into the center of the top of the vertical section of the punch slide and is locked there by a nut 17. This stud extends upwardly through a bushing 18 that is threaded into a cap 19 which is fastened to the top of the gate in the particular embodiment of the invention illustrated, which is the preferred form. On this bushing above the cap is screwed a nut 20. This bushing and nut together form an adjustable sleeve surrounding the stud, the total length of which sleeve can be altered by turning the nut on the bushmg. Screwed on the upper end of the stud are a stop nut 21 and a lock nut 22. The stud has a sliding fit through the bushing and nut that is screwed upon the bushing. The bushing is adjusted in the cap so that its lower end will be engaged by the nut 17 on the stud when the slide is raised and this determines the limit of upward movement of the slide. The nut 20 is adjusted on the bushing so that its upper face will be engaged by the nut 21 on the rod when the slide is down. This determines the limit of downward movement of the slide. With this preferred arrangement an adjustment is provided for both the upward and downward movements of the slide and either can be fixed without disturbing the other. However, the nut 20 could be omitted, if desired, and the nut 21 adjusted on'the rod 16 so as to engage directly with the upper end of the bushing fo'r determining the downward limit of movement of the slide.

The slide described is relatively light in weight and is simple tomanufacture and with the stopping means illustrated there are no off center engagements which cause side thrusts and friction and add to the wear on the slide and its way. Thus, not only is the slide construction described simpler to manufacture, and adjust, but the life of the parts is lengthened over the construction previously employed; 7

The invention claimed is 1. The combination in a multiple "stroke header of a horizontally reciprocating gate, a punch transfer slide vertically movable at the front of said gate, a cap fastened to the gate and extending over's'aid slide, a sleeve adjustable vertically in said cap, astud extending upward from the center of the top of the slide and having a movable fit through said sleeve, and means on's'aid stud adapted to engage said sleeve for determining the upward and downward limits of the vertical movements of said slide; w

e 2 The combination in a multiple stroke header of a horizontally reciprocating gate, a

punch transfer slide vertically movable at the front of said gate, a cap fastened to the gate and extending over'sai'd slide, a threaded bushing adjustable vertically in said cap, a threaded nut adjustable on said bushing, a stud extending upward from the center of the top of the slide and having a movable fit through said bushing and nut, and means on said stud adapted't'o engage said bushing and nut for determining the upward and downward limits of the vertical movements er said Slide.

ALBERT H. GAESS. 

